Quantification of the Impact of Nauru Island on ARM Measurements
Quantification of the Impact of Nauru Island on ARM Measurements
复制标题
量化瑙鲁岛对 ARM 测量的影响
DOI：
10.1175/jamc-d-11-0174.1
复制
发表时间：
2012
影响因子：
3
通讯作者：
S. McFarlane
中科院分区：
文献类型：
--
作者：
C. Long;S. McFarlane
摘要瑙鲁岛有时会产生低云，影响低层云统计数据和大气辐射测量计划 (ARM) 站点进行的下降流短波辐射测量。本研究使用瑙鲁五年的数据来量化岛屿对现场测量的影响。结果表明，由太阳能加热产生的瑙鲁岛效应大约有 11% 的时间发生在白天。当有云时，岛屿效应使 500~1000 米云底出现率增加 15%~20%，但由于岛屿效应仅出现 11% 的时间，因此日间低云统计总体增加 2%，24 小时统计增加 1%。以类似的方式，岛屿效应使白天下流短波 (SW) 辐射在其发生的 11% 时间内减少约 17%，总体日光平均减少 2%（或 24 小时减少 1%）。岛屿效应会产生频繁的正向下降西南云效应，特别是在早晨，这......
AbstractNauru Island at times generates low clouds that impact low-level cloud statistics and downwelling shortwave radiation measurements made at the Atmospheric Radiation Measurement Program (ARM) site. This study uses five years of Nauru data to quantify the island impact on the site measurements. The results indicate that the solar-heating-produced Nauru island effect occurs about 11% of the time during daylight hours. The island effect increases the 500–1000-m cloud base occurrence by 15%–20% when clouds occur, but because the island effect only occurs 11% of the time the overall increase in daylight low-cloud statistics is 2%, or 1% for 24-h statistics. In a similar way, the island effect produces a reduction of about 17% in the downwelling shortwave (SW) radiation across the daylight hours during the 11% of the time it occurs, an overall 2% daylight (or 1% for 24 h) average reduction. The island effect produces frequent positive downwelling SW cloud effects, in particular during the morning, which ...